Hello. I have a bad proximity sensor in my 130w CO2 Laser and I was wondering if I can replace the one I have which is rated 5-30v with a 10-30v. I can not find a supplier in the US.
The important thing is that it is a NPN device, this refers to the switching polarity (normally open vs. normally closed).
There are lots of inductive sensors around (3d printer suppliers typically have them) and so long as you match the polarity and voltage range you will be ok.
You might be able to match the form-factor or you may need to make a plate to fit it, with some adjustments of course.
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Thanks, so the voltage range needs to match (5-30v).
These may be a direct replacement:
New egg:Unique Bargains 4mm Inductive Proximity Sensor Switch NPN NO DC 5-30V 200mA 3-wire SN04-N - Newegg.com
Light Object: SN04-N Metal Proximity Sensor - LightObject | Professional Laser Cutters and Engravers Solutions
They are also on AliExpress although its url will not resolve.
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Well, you need to match the voltage your machine uses… that’s almost always 5v if the sensor simply plugs into the controller board. It won’t be greater than the motor supply voltage (12 or 24v).
You can check this with a voltmeter or by tracing where the wires go. But most inductive sensors have a wide supply voltage range anyway, they all use a similar circuit internally, but come in many different shapes.
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Thank you Don! I’m gonna try aliexpress and see if they can do a fast shipping. Its probably gonna cost more than the part itself.